commit 588794771fdaf7cd129efb2043fb58572c8b04ca Author: David Goulet dgoulet@torproject.org Date: Wed Oct 30 14:26:21 2019 -0400
circ: Add hidden service helper functions
Functions to correctly identify HS circuit type and version.
Part of #32020
Signed-off-by: David Goulet dgoulet@torproject.org --- src/core/or/circuituse.c | 72 ++++++++++++++++++++++++++++++++++++------------ src/core/or/circuituse.h | 9 ++++++ 2 files changed, 64 insertions(+), 17 deletions(-)
diff --git a/src/core/or/circuituse.c b/src/core/or/circuituse.c index a74ecbfd5..8a667024d 100644 --- a/src/core/or/circuituse.c +++ b/src/core/or/circuituse.c @@ -1965,23 +1965,61 @@ have_enough_path_info(int need_exit) int circuit_purpose_is_hidden_service(uint8_t purpose) { - if (purpose == CIRCUIT_PURPOSE_HS_VANGUARDS) { - return 1; - } - - /* Client-side purpose */ - if (purpose >= CIRCUIT_PURPOSE_C_HS_MIN_ && - purpose <= CIRCUIT_PURPOSE_C_HS_MAX_) { - return 1; - } - - /* Service-side purpose */ - if (purpose >= CIRCUIT_PURPOSE_S_HS_MIN_ && - purpose <= CIRCUIT_PURPOSE_S_HS_MAX_) { - return 1; - } - - return 0; + /* HS Vanguard purpose. */ + if (circuit_purpose_is_hs_vanguards(purpose)) { + return 1; + } + + /* Client-side purpose */ + if (circuit_purpose_is_hs_client(purpose)) { + return 1; + } + + /* Service-side purpose */ + 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)); }
/** diff --git a/src/core/or/circuituse.h b/src/core/or/circuituse.h index 25588dbb1..8709d74b8 100644 --- a/src/core/or/circuituse.h +++ b/src/core/or/circuituse.h @@ -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);