sendme.c File Reference

Code that is related to SENDME cells both in terms of creating/parsing cells and handling the content. More...

#include "core/or/or.h"
#include "app/config/config.h"
#include "core/crypto/relay_crypto.h"
#include "core/mainloop/connection.h"
#include "core/or/cell_st.h"
#include "core/or/crypt_path.h"
#include "core/or/circuitlist.h"
#include "core/or/circuituse.h"
#include "core/or/or_circuit_st.h"
#include "core/or/relay.h"
#include "core/or/sendme.h"
#include "feature/nodelist/networkstatus.h"
#include "lib/ctime/di_ops.h"
#include "trunnel/sendme_cell.h"

Go to the source code of this file.

Functions
STATIC int	get_emit_min_version (void)
STATIC int	get_accept_min_version (void)
static uint8_t *	pop_first_cell_digest (const circuit_t *circ)
static bool	v1_digest_matches (const uint8_t *circ_digest, const uint8_t *cell_digest)
static bool	cell_v1_is_valid (const sendme_cell_t *cell, const uint8_t *circ_digest)
STATIC bool	cell_version_can_be_handled (uint8_t cell_version)
STATIC bool	sendme_is_valid (const circuit_t *circ, const uint8_t *cell_payload, size_t cell_payload_len)
STATIC ssize_t	build_cell_payload_v1 (const uint8_t *cell_digest, uint8_t *payload)
static int	send_circuit_level_sendme (circuit_t *circ, crypt_path_t *layer_hint, const uint8_t *cell_digest)
static void	record_cell_digest_on_circ (circuit_t *circ, const uint8_t *sendme_digest)
static bool	circuit_sendme_cell_is_next (int window)
void	sendme_connection_edge_consider_sending (edge_connection_t *conn)
void	sendme_circuit_consider_sending (circuit_t *circ, crypt_path_t *layer_hint)
int	sendme_process_circuit_level (crypt_path_t *layer_hint, circuit_t *circ, const uint8_t *cell_payload, uint16_t cell_payload_len)
int	sendme_process_stream_level (edge_connection_t *conn, circuit_t *circ, uint16_t cell_body_len)
int	sendme_circuit_data_received (circuit_t *circ, crypt_path_t *layer_hint)
int	sendme_stream_data_received (edge_connection_t *conn)
int	sendme_note_circuit_data_packaged (circuit_t *circ, crypt_path_t *layer_hint)
int	sendme_note_stream_data_packaged (edge_connection_t *conn)
void	sendme_record_cell_digest_on_circ (circuit_t *circ, crypt_path_t *cpath)
void	sendme_record_received_cell_digest (circuit_t *circ, crypt_path_t *cpath)
void	sendme_record_sending_cell_digest (circuit_t *circ, crypt_path_t *cpath)

Detailed Description

Code that is related to SENDME cells both in terms of creating/parsing cells and handling the content.

Definition in file sendme.c.

Function Documentation

circuit_sendme_cell_is_next()

static bool circuit_sendme_cell_is_next ( int  window )

static

Return true iff the next cell for the given cell window is expected to be a SENDME.

We are able to know that because the package or deliver window value minus one cell (the possible SENDME cell) should be a multiple of the increment window value.

Definition at line 341 of file sendme.c.

sendme_circuit_consider_sending()

void sendme_circuit_consider_sending	(	circuit_t *	circ,
		crypt_path_t *	layer_hint
	)

Check if the deliver_window for circuit circ (at hop layer_hint if it's defined) is low enough that we should send a circuit-level sendme back down the circuit. If so, send enough sendmes that the window would be overfull if we sent any more.

Definition at line 418 of file sendme.c.

sendme_connection_edge_consider_sending()

void sendme_connection_edge_consider_sending

(

edge_connection_t *

conn

)

Called when we've just received a relay data cell, when we've just finished flushing all bytes to stream conn, or when we've flushed some bytes to the stream conn.

If conn->outbuf is not too full, and our deliver window is low, send back a suitable number of stream-level sendme cells.

Definition at line 375 of file sendme.c.

Referenced by connection_edge_finished_flushing().