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#ifndef SOCK_INTERNAL_H

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#define SOCK_INTERNAL_H

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#include "sock.h"

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/*

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 * The base type struct, which defines the method table.

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 */

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struct sock_stream_type {

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    /* method table */

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    struct sock_stream_methods {

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        /* Normal read(2) */

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        err_t (*read) (struct sock_stream *sock, void *buf, size_t len);

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        /* Normal write(2) */

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        err_t (*write) (struct sock_stream *sock, const void *buf, size_t len);

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    } methods;

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};

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/*

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 * The base sock_stream type, as used by the sock_stream_* functions.

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 *

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 * The specific implementations should embed this at the start of their type-specific struct, and then cast around

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 * as appropriate.

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 */

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struct sock_stream {

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    /* The sock_stream_type for this socket */

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    struct sock_stream_type *type;

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    /* Last error info */

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    struct error_info err;

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};

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#define SOCK_FROM_BASE(sock, type) ((type*) sock)

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#define SOCK_ERR(sock) (&(sock)->err)

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/*

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 * Initialize a sock_stream with the given sock_stream_type.

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 *

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 * The sock_stream should be initialized to zero. It is a bug to call this twice.

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 */

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void sock_stream_init (struct sock_stream *sock, struct sock_stream_type *type);

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#endif /* SOCK_INTERNAL_H */