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hs-v2: Modernize rend_client_circuit_cleanup() code

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Old and messy code path. Structure it in a more pleasant and readable way. No
behavior change with this refactor.

Part of #32020

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2019-10-30 15:17:47 -04:00 committed by George Kadianakis
parent 00136c9430
commit 1aafe3376e
2 changed files with 51 additions and 36 deletions
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85
src/feature/rend/rendclient.c
View File

@ -1254,47 +1254,62 @@ rend_parse_service_authorization(const or_options_t *options,
/** The given circuit is being freed. Take appropriate action if it is of
* interest to the client subsystem. */
void
rend_client_circuit_cleanup(circuit_t *circ)
rend_client_circuit_cleanup(const circuit_t *circ)
{
int reason = circ->marked_for_close_reason;
int orig_reason = circ->marked_for_close_orig_reason;
int reason, orig_reason;
bool has_timed_out, ip_is_redundant;
const origin_circuit_t *ocirc = NULL;
tor_assert(circ);
tor_assert(CIRCUIT_IS_ORIGIN(circ));
if (circ->purpose == CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT) {
origin_circuit_t *ocirc = TO_ORIGIN_CIRCUIT(circ);
int timed_out = (reason == END_CIRC_REASON_TIMEOUT);
reason = circ->marked_for_close_reason;
orig_reason = circ->marked_for_close_orig_reason;
ocirc = CONST_TO_ORIGIN_CIRCUIT(circ);
tor_assert(ocirc->rend_data);
has_timed_out = (reason == END_CIRC_REASON_TIMEOUT);
ip_is_redundant = (orig_reason == END_CIRC_REASON_IP_NOW_REDUNDANT);
switch (circ->purpose) {
case CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT:
{
if (ip_is_redundant) {
break;
}
tor_assert(circ->state == CIRCUIT_STATE_OPEN);
tor_assert(ocirc->build_state->chosen_exit);
if (orig_reason != END_CIRC_REASON_IP_NOW_REDUNDANT &&
ocirc->rend_data) {
/* treat this like getting a nack from it */
log_info(LD_REND, "Failed intro circ %s to %s (awaiting ack). %s",
safe_str_client(rend_data_get_address(ocirc->rend_data)),
safe_str_client(build_state_get_exit_nickname(ocirc->build_state)),
timed_out ? "Recording timeout." : "Removing from descriptor.");
rend_client_report_intro_point_failure(ocirc->build_state->chosen_exit,
ocirc->rend_data,
timed_out ?
INTRO_POINT_FAILURE_TIMEOUT :
INTRO_POINT_FAILURE_GENERIC);
}
} else if (circ->purpose == CIRCUIT_PURPOSE_C_INTRODUCING &&
reason != END_CIRC_REASON_TIMEOUT) {
origin_circuit_t *ocirc = TO_ORIGIN_CIRCUIT(circ);
if (ocirc->build_state->chosen_exit && ocirc->rend_data) {
if (orig_reason != END_CIRC_REASON_IP_NOW_REDUNDANT &&
ocirc->rend_data) {
log_info(LD_REND, "Failed intro circ %s to %s "
"(building circuit to intro point). "
"Marking intro point as possibly unreachable.",
safe_str_client(rend_data_get_address(ocirc->rend_data)),
safe_str_client(build_state_get_exit_nickname(
ocirc->build_state)));
rend_client_report_intro_point_failure(ocirc->build_state->chosen_exit,
ocirc->rend_data,
INTRO_POINT_FAILURE_UNREACHABLE);
}
/* Treat this like getting a nack from it */
log_info(LD_REND, "Failed intro circ %s to %s (awaiting ack). %s",
safe_str_client(rend_data_get_address(ocirc->rend_data)),
safe_str_client(build_state_get_exit_nickname(ocirc->build_state)),
has_timed_out ? "Recording timeout." : "Removing from descriptor.");
rend_client_report_intro_point_failure(ocirc->build_state->chosen_exit,
ocirc->rend_data,
has_timed_out ?
INTRO_POINT_FAILURE_TIMEOUT :
INTRO_POINT_FAILURE_GENERIC);
break;
}
case CIRCUIT_PURPOSE_C_INTRODUCING:
{
/* Ignore if we were introducing and it timed out, we didn't pick an exit
* point yet (IP) or the reason indicate that it was a redundant IP. */
if (has_timed_out || !ocirc->build_state->chosen_exit || ip_is_redundant) {
break;
}
log_info(LD_REND, "Failed intro circ %s to %s "
"(building circuit to intro point). "
"Marking intro point as possibly unreachable.",
safe_str_client(rend_data_get_address(ocirc->rend_data)),
safe_str_client(build_state_get_exit_nickname(
ocirc->build_state)));
rend_client_report_intro_point_failure(ocirc->build_state->chosen_exit,
ocirc->rend_data,
INTRO_POINT_FAILURE_UNREACHABLE);
break;
}
default:
break;
}
}

2
src/feature/rend/rendclient.h
View File

@ -47,7 +47,7 @@ rend_service_authorization_t *rend_client_lookup_service_authorization(
const char *onion_address);
void rend_service_authorization_free_all(void);
void rend_client_circuit_cleanup(circuit_t *circ);
void rend_client_circuit_cleanup(const circuit_t *circ);
#endif /* !defined(TOR_RENDCLIENT_H) */