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circ: Add hidden service helper functions

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Functions to correctly identify HS circuit type and version.

Part of #32020

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2019-10-30 14:26:21 -04:00
parent 21b3303657
commit 588794771f
2 changed files with 61 additions and 14 deletions
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48
src/core/or/circuituse.c
View File

@ -1965,25 +1965,63 @@ have_enough_path_info(int need_exit)
int
circuit_purpose_is_hidden_service(uint8_t purpose)
{
if (purpose == CIRCUIT_PURPOSE_HS_VANGUARDS) {
/* HS Vanguard purpose. */
if (circuit_purpose_is_hs_vanguards(purpose)) {
return 1;
}
/* Client-side purpose */
if (purpose >= CIRCUIT_PURPOSE_C_HS_MIN_ &&
purpose <= CIRCUIT_PURPOSE_C_HS_MAX_) {
if (circuit_purpose_is_hs_client(purpose)) {
return 1;
}
/* Service-side purpose */
if (purpose >= CIRCUIT_PURPOSE_S_HS_MIN_ &&
purpose <= CIRCUIT_PURPOSE_S_HS_MAX_) {
if (circuit_purpose_is_hs_service(purpose)) {
return 1;
}
return 0;
}
/** Retrun true iff the given circuit is an HS client circuit. */
bool
circuit_purpose_is_hs_client(const uint8_t purpose)
{
return (purpose >= CIRCUIT_PURPOSE_C_HS_MIN_ &&
purpose <= CIRCUIT_PURPOSE_C_HS_MAX_);
}
/** Retrun true iff the given circuit is an HS service circuit. */
bool
circuit_purpose_is_hs_service(const uint8_t purpose)
{
return (purpose >= CIRCUIT_PURPOSE_S_HS_MIN_ &&
purpose <= CIRCUIT_PURPOSE_S_HS_MAX_);
}
/** Retrun true iff the given circuit is an HS Vanguards circuit. */
bool
circuit_purpose_is_hs_vanguards(const uint8_t purpose)
{
return (purpose == CIRCUIT_PURPOSE_HS_VANGUARDS);
}
/** Retrun true iff the given circuit is an HS v2 circuit. */
bool
circuit_is_hs_v2(const circuit_t *circ)
{
return (CIRCUIT_IS_ORIGIN(circ) &&
(CONST_TO_ORIGIN_CIRCUIT(circ)->rend_data != NULL));
}
/** Retrun true iff the given circuit is an HS v3 circuit. */
bool
circuit_is_hs_v3(const circuit_t *circ)
{
return (CIRCUIT_IS_ORIGIN(circ) &&
(CONST_TO_ORIGIN_CIRCUIT(circ)->hs_ident != NULL));
}
/**
* Return true if this circuit purpose should use vanguards
* or pinned Layer2 or Layer3 guards.

9
src/core/or/circuituse.h
View File

@ -64,6 +64,15 @@ int hostname_in_track_host_exits(const or_options_t *options,
void mark_circuit_unusable_for_new_conns(origin_circuit_t *circ);
int circuit_purpose_is_hidden_service(uint8_t);
/* Series of helper functions for hidden services. */
bool circuit_purpose_is_hs_client(const uint8_t purpose);
bool circuit_purpose_is_hs_service(const uint8_t purpose);
bool circuit_purpose_is_hs_vanguards(const uint8_t purpose);
bool circuit_is_hs_v2(const circuit_t *circ);
bool circuit_is_hs_v3(const circuit_t *circ);
int circuit_should_use_vanguards(uint8_t);
void circuit_sent_valid_data(origin_circuit_t *circ, uint16_t relay_body_len);
void circuit_read_valid_data(origin_circuit_t *circ, uint16_t relay_body_len);