diff options
Diffstat (limited to 'src/or/protover.c')
| -rw-r--r-- | src/or/protover.c | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/src/or/protover.c b/src/or/protover.c index 0e74deb112..1a5f4ac91f 100644 --- a/src/or/protover.c +++ b/src/or/protover.c @@ -34,6 +34,7 @@ static int protocol_list_contains(const smartlist_t *protos, protocol_type_t pr, uint32_t ver); /** Mapping between protocol type string and protocol type. */ +/// C_RUST_COUPLED: src/rust/protover/protover.rs `PROTOCOL_NAMES` static const struct { protocol_type_t protover_type; const char *name; @@ -95,7 +96,7 @@ str_to_protocol_type(const char *s, protocol_type_t *pr_out) * Release all space held by a single proto_entry_t structure */ STATIC void -proto_entry_free(proto_entry_t *entry) +proto_entry_free_(proto_entry_t *entry) { if (!entry) return; @@ -282,8 +283,45 @@ protocol_list_supports_protocol(const char *list, protocol_type_t tp, return contains; } +/** + * Return true iff "list" encodes a protocol list that includes support for + * the indicated protocol and version, or some later version. + */ +int +protocol_list_supports_protocol_or_later(const char *list, + protocol_type_t tp, + uint32_t version) +{ + /* NOTE: This is a pretty inefficient implementation. If it ever shows + * up in profiles, we should memoize it. + */ + smartlist_t *protocols = parse_protocol_list(list); + if (!protocols) { + return 0; + } + const char *pr_name = protocol_type_to_str(tp); + + int contains = 0; + SMARTLIST_FOREACH_BEGIN(protocols, proto_entry_t *, proto) { + if (strcasecmp(proto->name, pr_name)) + continue; + SMARTLIST_FOREACH_BEGIN(proto->ranges, const proto_range_t *, range) { + if (range->high >= version) { + contains = 1; + goto found; + } + } SMARTLIST_FOREACH_END(range); + } SMARTLIST_FOREACH_END(proto); + + found: + SMARTLIST_FOREACH(protocols, proto_entry_t *, ent, proto_entry_free(ent)); + smartlist_free(protocols); + return contains; +} + /** Return the canonical string containing the list of protocols * that we support. */ +/// C_RUST_COUPLED: src/rust/protover/protover.rs `SUPPORTED_PROTOCOLS` const char * protover_get_supported_protocols(void) { @@ -367,6 +405,8 @@ encode_protocol_list(const smartlist_t *sl) /* We treat any protocol list with more than this many subprotocols in it * as a DoS attempt. */ +/// C_RUST_COUPLED: src/rust/protover/protover.rs +/// `MAX_PROTOCOLS_TO_EXPAND` static const int MAX_PROTOCOLS_TO_EXPAND = (1<<16); /** Voting helper: Given a list of proto_entry_t, return a newly allocated @@ -693,9 +733,15 @@ protocol_list_contains(const smartlist_t *protos, * Note that this is only used to infer protocols for Tor versions that * can't declare their own. **/ +/// C_RUST_COUPLED: src/rust/protover/protover.rs `compute_for_old_tor` const char * protover_compute_for_old_tor(const char *version) { + if (version == NULL) { + /* No known version; guess the oldest series that is still supported. */ + version = "0.2.5.15"; + } + if (tor_version_as_new_as(version, FIRST_TOR_VERSION_TO_ADVERTISE_PROTOCOLS)) { return ""; @@ -737,5 +783,5 @@ protover_free_all(void) } } -#endif +#endif /* !defined(HAVE_RUST) */ |