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Diffstat (limited to 'src/trunnel/flow_control_cells.h')
| -rw-r--r-- | src/trunnel/flow_control_cells.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/trunnel/flow_control_cells.h b/src/trunnel/flow_control_cells.h new file mode 100644 index 0000000000..b8108b9a24 --- /dev/null +++ b/src/trunnel/flow_control_cells.h @@ -0,0 +1,120 @@ +/* flow_control_cells.h -- generated by Trunnel v1.5.3. + * https://gitweb.torproject.org/trunnel.git + * You probably shouldn't edit this file. + */ +#ifndef TRUNNEL_FLOW_CONTROL_CELLS_H +#define TRUNNEL_FLOW_CONTROL_CELLS_H + +#include <stdint.h> +#include "trunnel.h" + +#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_XOFF_CELL) +struct xoff_cell_st { + uint8_t version; + uint8_t trunnel_error_code_; +}; +#endif +typedef struct xoff_cell_st xoff_cell_t; +#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_XON_CELL) +struct xon_cell_st { + uint8_t version; + uint32_t kbps_ewma; + uint8_t trunnel_error_code_; +}; +#endif +typedef struct xon_cell_st xon_cell_t; +/** Return a newly allocated xoff_cell with all elements set to zero. + */ +xoff_cell_t *xoff_cell_new(void); +/** Release all storage held by the xoff_cell in 'victim'. (Do nothing + * if 'victim' is NULL.) + */ +void xoff_cell_free(xoff_cell_t *victim); +/** Try to parse a xoff_cell from the buffer in 'input', using up to + * 'len_in' bytes from the input buffer. On success, return the number + * of bytes consumed and set *output to the newly allocated + * xoff_cell_t. On failure, return -2 if the input appears truncated, + * and -1 if the input is otherwise invalid. + */ +ssize_t xoff_cell_parse(xoff_cell_t **output, const uint8_t *input, const size_t len_in); +/** Return the number of bytes we expect to need to encode the + * xoff_cell in 'obj'. On failure, return a negative value. Note that + * this value may be an overestimate, and can even be an underestimate + * for certain unencodeable objects. + */ +ssize_t xoff_cell_encoded_len(const xoff_cell_t *obj); +/** Try to encode the xoff_cell from 'input' into the buffer at + * 'output', using up to 'avail' bytes of the output buffer. On + * success, return the number of bytes used. On failure, return -2 if + * the buffer was not long enough, and -1 if the input was invalid. + */ +ssize_t xoff_cell_encode(uint8_t *output, size_t avail, const xoff_cell_t *input); +/** Check whether the internal state of the xoff_cell in 'obj' is + * consistent. Return NULL if it is, and a short message if it is not. + */ +const char *xoff_cell_check(const xoff_cell_t *obj); +/** Clear any errors that were set on the object 'obj' by its setter + * functions. Return true iff errors were cleared. + */ +int xoff_cell_clear_errors(xoff_cell_t *obj); +/** Return the value of the version field of the xoff_cell_t in 'inp' + */ +uint8_t xoff_cell_get_version(const xoff_cell_t *inp); +/** Set the value of the version field of the xoff_cell_t in 'inp' to + * 'val'. Return 0 on success; return -1 and set the error code on + * 'inp' on failure. + */ +int xoff_cell_set_version(xoff_cell_t *inp, uint8_t val); +/** Return a newly allocated xon_cell with all elements set to zero. + */ +xon_cell_t *xon_cell_new(void); +/** Release all storage held by the xon_cell in 'victim'. (Do nothing + * if 'victim' is NULL.) + */ +void xon_cell_free(xon_cell_t *victim); +/** Try to parse a xon_cell from the buffer in 'input', using up to + * 'len_in' bytes from the input buffer. On success, return the number + * of bytes consumed and set *output to the newly allocated + * xon_cell_t. On failure, return -2 if the input appears truncated, + * and -1 if the input is otherwise invalid. + */ +ssize_t xon_cell_parse(xon_cell_t **output, const uint8_t *input, const size_t len_in); +/** Return the number of bytes we expect to need to encode the + * xon_cell in 'obj'. On failure, return a negative value. Note that + * this value may be an overestimate, and can even be an underestimate + * for certain unencodeable objects. + */ +ssize_t xon_cell_encoded_len(const xon_cell_t *obj); +/** Try to encode the xon_cell from 'input' into the buffer at + * 'output', using up to 'avail' bytes of the output buffer. On + * success, return the number of bytes used. On failure, return -2 if + * the buffer was not long enough, and -1 if the input was invalid. + */ +ssize_t xon_cell_encode(uint8_t *output, size_t avail, const xon_cell_t *input); +/** Check whether the internal state of the xon_cell in 'obj' is + * consistent. Return NULL if it is, and a short message if it is not. + */ +const char *xon_cell_check(const xon_cell_t *obj); +/** Clear any errors that were set on the object 'obj' by its setter + * functions. Return true iff errors were cleared. + */ +int xon_cell_clear_errors(xon_cell_t *obj); +/** Return the value of the version field of the xon_cell_t in 'inp' + */ +uint8_t xon_cell_get_version(const xon_cell_t *inp); +/** Set the value of the version field of the xon_cell_t in 'inp' to + * 'val'. Return 0 on success; return -1 and set the error code on + * 'inp' on failure. + */ +int xon_cell_set_version(xon_cell_t *inp, uint8_t val); +/** Return the value of the kbps_ewma field of the xon_cell_t in 'inp' + */ +uint32_t xon_cell_get_kbps_ewma(const xon_cell_t *inp); +/** Set the value of the kbps_ewma field of the xon_cell_t in 'inp' to + * 'val'. Return 0 on success; return -1 and set the error code on + * 'inp' on failure. + */ +int xon_cell_set_kbps_ewma(xon_cell_t *inp, uint32_t val); + + +#endif |