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struct st_vio; /* Only C */
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typedef struct st_vio Vio;
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#define VIO_LOCALHOST 1 /* a localhost connection */
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#define VIO_BUFFERED_READ 2 /* use buffered read */
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#define VIO_READ_BUFFER_SIZE 16384 /* size of read buffer */
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Vio* vio_new(int sd, enum enum_vio_type type, uint flags);
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Vio* vio_new(int sd, enum enum_vio_type type, unsigned int flags);
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void vio_delete(Vio* vio);
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int vio_close(Vio* vio);
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void vio_reset(Vio* vio, enum enum_vio_type type, int sd, uint32_t flags);
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size_t vio_read(Vio *vio, uchar * buf, size_t size);
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size_t vio_read_buff(Vio *vio, uchar * buf, size_t size);
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size_t vio_write(Vio *vio, const uchar * buf, size_t size);
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size_t vio_read(Vio *vio, unsigned char * buf, size_t size);
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size_t vio_read_buff(Vio *vio, unsigned char * buf, size_t size);
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size_t vio_write(Vio *vio, const unsigned char * buf, size_t size);
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int vio_blocking(Vio *vio, bool onoff, bool *old_mode);
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bool vio_is_blocking(Vio *vio);
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/* setsockopt TCP_NODELAY at IPPROTO_TCP level, when possible */
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/* Remote peer's address and name in text form */
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bool vio_peer_addr(Vio *vio, char *buf, uint16_t *port, size_t buflen);
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bool vio_poll_read(Vio *vio, int timeout);
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bool vio_peek_read(Vio *vio, uint *bytes);
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bool vio_peek_read(Vio *vio, unsigned int *bytes);
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void vio_end(void);
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/* function pointers. They are similar for socket/SSL/whatever */
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void (*viodelete)(Vio*);
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int32_t (*vioerrno)(Vio*);
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size_t (*read)(Vio*, uchar *, size_t);
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size_t (*write)(Vio*, const uchar *, size_t);
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size_t (*read)(Vio*, unsigned char *, size_t);
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size_t (*write)(Vio*, const unsigned char *, size_t);
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int32_t (*vioblocking)(Vio*, bool, bool *);
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bool (*is_blocking)(Vio*);
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int32_t (*viokeepalive)(Vio*, bool);