Header file for onion.c. More...

#include "lib/crypt_ops/crypto_ed25519.h"

Data Structures
struct	create_cell_t

struct	created_cell_t

struct	extend_cell_t

struct	extended_cell_t

Macros
#define	MAX_ONIONSKIN_CHALLENGE_LEN 255

#define	MAX_ONIONSKIN_REPLY_LEN 255

#define	MAX_CREATE_LEN (CELL_PAYLOAD_SIZE - 4)

#define	MAX_CREATED_LEN (CELL_PAYLOAD_SIZE - 2)

Functions
void	create_cell_init (create_cell_t cell_out, uint8_t cell_type, uint16_t handshake_type, uint16_t handshake_len, const uint8_t onionskin)

int	create_cell_parse (create_cell_t cell_out, const cell_t cell_in)

int	created_cell_parse (created_cell_t cell_out, const cell_t cell_in)

int	extend_cell_parse (extend_cell_t cell_out, const uint8_t command, const uint8_t payload_in, size_t payload_len)

int	extended_cell_parse (extended_cell_t cell_out, const uint8_t command, const uint8_t payload_in, size_t payload_len)

int	create_cell_format (cell_t cell_out, const create_cell_t cell_in)

int	create_cell_format_relayed (cell_t cell_out, const create_cell_t cell_in)

int	created_cell_format (cell_t cell_out, const created_cell_t cell_in)

int	extend_cell_format (uint8_t command_out, uint16_t len_out, uint8_t payload_out, const extend_cell_t cell_in)

int	extended_cell_format (uint8_t command_out, uint16_t len_out, uint8_t payload_out, const extended_cell_t cell_in)

Detailed Description

Header file for onion.c.

Definition in file onion.h.

Macro Definition Documentation

◆ MAX_CREATE_LEN

#define MAX_CREATE_LEN (CELL_PAYLOAD_SIZE - 4)

Definition at line 23 of file onion.h.

◆ MAX_CREATED_LEN

#define MAX_CREATED_LEN (CELL_PAYLOAD_SIZE - 2)

Definition at line 24 of file onion.h.

◆ MAX_ONIONSKIN_CHALLENGE_LEN

#define MAX_ONIONSKIN_CHALLENGE_LEN 255

Definition at line 20 of file onion.h.

◆ MAX_ONIONSKIN_REPLY_LEN

#define MAX_ONIONSKIN_REPLY_LEN 255

Definition at line 21 of file onion.h.

Function Documentation

◆ create_cell_format()

int create_cell_format	(	cell_t *	cell_out,
		const create_cell_t *	cell_in )

Definition at line 495 of file onion.c.

◆ create_cell_format_relayed()

int create_cell_format_relayed	(	cell_t *	cell_out,
		const create_cell_t *	cell_in )

Definition at line 501 of file onion.c.

◆ create_cell_init()

void create_cell_init	(	create_cell_t *	cell_out,
		uint8_t	cell_type,
		uint16_t	handshake_type,
		uint16_t	handshake_len,
		const uint8_t *	onionskin )

Write the various parameters into the create cell. Separate from create_cell_parse() to make unit testing easier.

Definition at line 101 of file onion.c.

Referenced by create_cell_parse(), and parse_create2_payload().

◆ create_cell_parse()

int create_cell_parse	(	create_cell_t *	cell_out,
		const cell_t *	cell_in )

Parse a CREATE, CREATE_FAST, or CREATE2 cell from cell_in into cell_out. Return 0 on success, -1 on failure. (We reject some syntactically valid CREATE2 cells that we can't generate or react to.)

Definition at line 153 of file onion.c.

Referenced by command_process_create_cell().

◆ created_cell_format()

int created_cell_format	(	cell_t *	cell_out,
		const created_cell_t *	cell_in )

Fill cell_out with a correctly formatted version of the CREATED{,_FAST,2} cell in cell_in. Return 0 on success, -1 on failure.

Definition at line 510 of file onion.c.

Referenced by onionskin_answer().

◆ created_cell_parse()

int created_cell_parse	(	created_cell_t *	cell_out,
		const cell_t *	cell_in )

Parse a CREATED, CREATED_FAST, or CREATED2 cell from cell_in into cell_out. Return 0 on success, -1 on failure.

Definition at line 199 of file onion.c.

Referenced by command_process_created_cell().

◆ extend_cell_format()

int extend_cell_format	(	uint8_t *	command_out,
		uint16_t *	len_out,
		uint8_t *	payload_out,
		const extend_cell_t *	cell_in )

Format the EXTEND{,2} cell in cell_in, storing its relay payload in payload_out, the number of bytes used in *len_out, and the relay command in *command_out. The payload_out must have RELAY_PAYLOAD_SIZE_MAX bytes available.

Return 0 on success, -1 on failure.

Definition at line 557 of file onion.c.

Referenced by circuit_send_intermediate_onion_skin().

◆ extend_cell_parse()

int extend_cell_parse	(	extend_cell_t *	cell_out,
		const uint8_t	command,
		const uint8_t *	payload,
		size_t	payload_length )

Parse an EXTEND or EXTEND2 cell (according to command) from the payload_length bytes of payload into cell_out. Return 0 on success, -1 on failure.

Definition at line 352 of file onion.c.

Referenced by circuit_extend().

◆ extended_cell_format()

int extended_cell_format	(	uint8_t *	command_out,
		uint16_t *	len_out,
		uint8_t *	payload_out,
		const extended_cell_t *	cell_in )

Format the EXTENDED{,2} cell in cell_in, storing its relay payload in payload_out, the number of bytes used in *len_out, and the relay command in *command_out. The payload_out must have RELAY_PAYLOAD_SIZE_MAX bytes available.