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https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-11 05:33:47 +01:00
Add a new GUARD_WAIT state for circuits
This state corresponds to the WAITING_FOR_BETTER_GUARD state; it's for circuits that are 100% constructed, but which we won't use until we are sure that we wouldn't use circuits with a better guard.
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@ -439,7 +439,13 @@ circuit_set_state(circuit_t *circ, uint8_t state)
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/* add to waiting-circuit list. */
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smartlist_add(circuits_pending_chans, circ);
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}
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if (state == CIRCUIT_STATE_OPEN)
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if (circ->state == CIRCUIT_STATE_GUARD_WAIT) {
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smartlist_remove(circuits_pending_other_guards, circ);
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}
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if (state == CIRCUIT_STATE_GUARD_WAIT) {
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smartlist_add(circuits_pending_other_guards, circ);
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}
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if (state == CIRCUIT_STATE_GUARD_WAIT || state == CIRCUIT_STATE_OPEN)
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tor_assert(!circ->n_chan_create_cell);
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circ->state = state;
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}
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@ -542,6 +548,8 @@ circuit_state_to_string(int state)
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case CIRCUIT_STATE_BUILDING: return "doing handshakes";
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case CIRCUIT_STATE_ONIONSKIN_PENDING: return "processing the onion";
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case CIRCUIT_STATE_CHAN_WAIT: return "connecting to server";
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case CIRCUIT_STATE_GUARD_WAIT: return "waiting to see how other "
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"guards perform";
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case CIRCUIT_STATE_OPEN: return "open";
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default:
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log_warn(LD_BUG, "Unknown circuit state %d", state);
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@ -1868,7 +1876,8 @@ circuit_about_to_free(circuit_t *circ)
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* module then. If it isn't OPEN, we send it there now to remember which
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* links worked and which didn't.
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*/
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if (circ->state != CIRCUIT_STATE_OPEN) {
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if (circ->state != CIRCUIT_STATE_OPEN &&
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circ->state != CIRCUIT_STATE_GUARD_WAIT) {
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if (CIRCUIT_IS_ORIGIN(circ)) {
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origin_circuit_t *ocirc = TO_ORIGIN_CIRCUIT(circ);
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circuit_build_failed(ocirc); /* take actions if necessary */
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@ -1881,7 +1890,9 @@ circuit_about_to_free(circuit_t *circ)
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}
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if (CIRCUIT_IS_ORIGIN(circ)) {
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control_event_circuit_status(TO_ORIGIN_CIRCUIT(circ),
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(circ->state == CIRCUIT_STATE_OPEN)?CIRC_EVENT_CLOSED:CIRC_EVENT_FAILED,
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(circ->state == CIRCUIT_STATE_OPEN ||
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circ->state == CIRCUIT_STATE_GUARD_WAIT) ?
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CIRC_EVENT_CLOSED:CIRC_EVENT_FAILED,
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orig_reason);
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}
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@ -2403,7 +2414,8 @@ assert_circuit_ok(const circuit_t *c)
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tor_assert(c->deliver_window >= 0);
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tor_assert(c->package_window >= 0);
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if (c->state == CIRCUIT_STATE_OPEN) {
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if (c->state == CIRCUIT_STATE_OPEN ||
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c->state == CIRCUIT_STATE_GUARD_WAIT) {
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tor_assert(!c->n_chan_create_cell);
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if (or_circ) {
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tor_assert(or_circ->n_crypto);
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@ -2596,6 +2596,8 @@ getinfo_helper_events(control_connection_t *control_conn,
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if (circ->base_.state == CIRCUIT_STATE_OPEN)
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state = "BUILT";
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else if (circ->base_.state == CIRCUIT_STATE_GUARD_WAIT)
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state = "GUARD_WAIT"; // XXXX prop271 must specify this.
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else if (circ->cpath)
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state = "EXTENDED";
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else
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@ -3379,7 +3381,8 @@ handle_control_extendcircuit(control_connection_t *conn, uint32_t len,
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goto done;
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}
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} else {
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if (circ->base_.state == CIRCUIT_STATE_OPEN) {
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if (circ->base_.state == CIRCUIT_STATE_OPEN ||
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circ->base_.state == CIRCUIT_STATE_GUARD_WAIT) {
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int err_reason = 0;
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circuit_set_state(TO_CIRCUIT(circ), CIRCUIT_STATE_BUILDING);
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if ((err_reason = circuit_send_next_onion_skin(circ)) < 0) {
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@ -438,8 +438,12 @@ typedef enum {
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/** Circuit state: I'd like to deliver a create, but my n_chan is still
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* connecting. */
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#define CIRCUIT_STATE_CHAN_WAIT 2
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/** Circuit state: the circuit is open but we don't want to actually use it
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* until we find out if a better guard will be available.
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*/
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#define CIRCUIT_STATE_GUARD_WAIT 3
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/** Circuit state: onionskin(s) processed, ready to send/receive cells. */
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#define CIRCUIT_STATE_OPEN 3
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#define CIRCUIT_STATE_OPEN 4
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#define CIRCUIT_PURPOSE_MIN_ 1
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