C++ (Cpp) circuit_send_next_onion_skin Examples

Example #1

File: command.c Project: chenglong7997/Tor

/** Process a 'created' <b>cell</b> that just arrived from <b>conn</b>.
 * Find the circuit
 * that it's intended for. If we're not the origin of the circuit, package
 * the 'created' cell in an 'extended' relay cell and pass it back. If we
 * are the origin of the circuit, send it to circuit_finish_handshake() to
 * finish processing keys, and then call circuit_send_next_onion_skin() to
 * extend to the next hop in the circuit if necessary.
 */
static void
command_process_created_cell(cell_t *cell, or_connection_t *conn)
{
  circuit_t *circ;

  circ = circuit_get_by_circid_orconn(cell->circ_id, conn);

  if (!circ) {
    log_info(LD_OR,
             "(circID %d) unknown circ (probably got a destroy earlier). "
             "Dropping.", cell->circ_id);
    return;
  }

  if (circ->n_circ_id != cell->circ_id) {
    log_fn(LOG_PROTOCOL_WARN,LD_PROTOCOL,
           "got created cell from Tor client? Closing.");
    circuit_mark_for_close(circ, END_CIRC_REASON_TORPROTOCOL);
    return;
  }

  if (CIRCUIT_IS_ORIGIN(circ)) { /* we're the OP. Handshake this. */
    origin_circuit_t *origin_circ = TO_ORIGIN_CIRCUIT(circ);
    int err_reason = 0;
    log_debug(LD_OR,"at OP. Finishing handshake.");
    if ((err_reason = circuit_finish_handshake(origin_circ, cell->command,
                                               cell->payload)) < 0) {
      log_warn(LD_OR,"circuit_finish_handshake failed.");
      circuit_mark_for_close(circ, -err_reason);
      return;
    }
    log_debug(LD_OR,"Moving to next skin.");
    if ((err_reason = circuit_send_next_onion_skin(origin_circ)) < 0) {
      log_info(LD_OR,"circuit_send_next_onion_skin failed.");
      /* XXX push this circuit_close lower */
      circuit_mark_for_close(circ, -err_reason);
      return;
    }
  } else { /* pack it into an extended relay cell, and send it. */
    log_debug(LD_OR,
              "Converting created cell to extended relay cell, sending.");
    relay_send_command_from_edge(0, circ, RELAY_COMMAND_EXTENDED,
                                 (char*)cell->payload, ONIONSKIN_REPLY_LEN,
                                 NULL);
  }
}

Example #2

File: command.c Project: Arcoins/Arcoin_Source

/** Process a 'created' <b>cell</b> that just arrived from <b>chan</b>.
 * Find the circuit
 * that it's intended for. If we're not the origin of the circuit, package
 * the 'created' cell in an 'extended' relay cell and pass it back. If we
 * are the origin of the circuit, send it to circuit_finish_handshake() to
 * finish processing keys, and then call circuit_send_next_onion_skin() to
 * extend to the next hop in the circuit if necessary.
 */
static void
command_process_created_cell(cell_t *cell, channel_t *chan)
{
  circuit_t *circ;
  extended_cell_t extended_cell;

  circ = circuit_get_by_circid_channel(cell->circ_id, chan);

  if (!circ) {
    log_info(LD_OR,
             "(circID %u) unknown circ (probably got a destroy earlier). "
             "Dropping.", (unsigned)cell->circ_id);
    return;
  }

  if (circ->n_circ_id != cell->circ_id) {
    log_fn(LOG_PROTOCOL_WARN,LD_PROTOCOL,
           "got created cell from Tor client? Closing.");
    circuit_mark_for_close(circ, END_CIRC_REASON_TORPROTOCOL);
    return;
  }

  if (created_cell_parse(&extended_cell.created_cell, cell) < 0) {
    log_fn(LOG_PROTOCOL_WARN, LD_OR, "Unparseable created cell.");
    circuit_mark_for_close(circ, END_CIRC_REASON_TORPROTOCOL);
    return;
  }

  if (CIRCUIT_IS_ORIGIN(circ)) { /* we're the OP. Handshake this. */
    origin_circuit_t *origin_circ = TO_ORIGIN_CIRCUIT(circ);
    int err_reason = 0;
    log_debug(LD_OR,"at OP. Finishing handshake.");
    if ((err_reason = circuit_finish_handshake(origin_circ,
                                        &extended_cell.created_cell)) < 0) {
      log_warn(LD_OR,"circuit_finish_handshake failed.");
      circuit_mark_for_close(circ, -err_reason);
      return;
    }
    log_debug(LD_OR,"Moving to next skin.");
    if ((err_reason = circuit_send_next_onion_skin(origin_circ)) < 0) {
      log_info(LD_OR,"circuit_send_next_onion_skin failed.");
      /* XXX push this circuit_close lower */
      circuit_mark_for_close(circ, -err_reason);
      return;
    }
  } else { /* pack it into an extended relay cell, and send it. */
    uint8_t command=0;
    uint16_t len=0;
    uint8_t payload[RELAY_PAYLOAD_SIZE];
    log_debug(LD_OR,
              "Converting created cell to extended relay cell, sending.");
    memset(payload, 0, sizeof(payload));
    if (extended_cell.created_cell.cell_type == CELL_CREATED2)
      extended_cell.cell_type = RELAY_COMMAND_EXTENDED2;
    else
      extended_cell.cell_type = RELAY_COMMAND_EXTENDED;
    if (extended_cell_format(&command, &len, payload, &extended_cell) < 0) {
      log_fn(LOG_PROTOCOL_WARN, LD_OR, "Can't format extended cell.");
      circuit_mark_for_close(circ, END_CIRC_REASON_TORPROTOCOL);
      return;
    }

    relay_send_command_from_edge(0, circ, command,
                                 (const char*)payload, len, NULL);
  }
}