src/core/or/conflux_cell.h

   1 /* Copyright (c) 2023, The Tor Project, Inc. */
   2 /* See LICENSE for licensing information */
   3
   4 /**
   5  * \file conflux_cell.h
   6  * \brief Header file for conflux_cell.c.
   7  **/
   8
   9 #ifndef TOR_CONFLUX_CELL_H
  10 #define TOR_CONFLUX_CELL_H
  11
  12 #include "core/or/or.h"
  13
  14 typedef struct conflux_cell_link_t {
  15   uint8_t version;
  16   uint8_t desired_ux;
  17   uint8_t nonce[DIGEST256_LEN];
  18
  19   uint64_t last_seqno_sent;
  20   uint64_t last_seqno_recv;
  21 } conflux_cell_link_t;
  22
  23 conflux_cell_link_t *conflux_cell_new_link(const uint8_t *nonce,
  24                                            uint64_t last_sent,
  25                                            uint64_t last_recv,
  26                                            uint8_t ux);
  27
  28 conflux_cell_link_t *conflux_cell_parse_link(const cell_t *cell,
  29                                              const uint16_t cell_len);
  30 conflux_cell_link_t *conflux_cell_parse_linked(const cell_t *cell,
  31                                                const uint16_t cell_le);
  32 uint32_t conflux_cell_parse_switch(const cell_t *cell,
  33                                    const uint16_t rh_len);
  34
  35 bool conflux_cell_send_link(const conflux_cell_link_t *link,
  36                             origin_circuit_t *circ);
  37 bool conflux_cell_send_linked(const conflux_cell_link_t *link,
  38                               or_circuit_t *circ);
  39 bool conflux_cell_send_linked_ack(origin_circuit_t *circ);
  40 bool conflux_send_switch_command(circuit_t *send_circ, uint64_t relative_seq);
  41
  42 #ifdef TOR_UNIT_TESTS
  43
  44 STATIC ssize_t
  45 build_link_cell(const conflux_cell_link_t *link, uint8_t *cell_out);
  46
  47 #endif /* TOR_UNIT_TESTS */
  48
  49 #endif /* TOR_CONFLUX_CELL_H */
  50