diff options
Diffstat (limited to 'src/or/protover.c')
| -rw-r--r-- | src/or/protover.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/src/or/protover.c b/src/or/protover.c index 2bde02c6ae..7314d61b60 100644 --- a/src/or/protover.c +++ b/src/or/protover.c @@ -1,9 +1,9 @@ #define PROTOVER_PRIVATE +#include "or.h" #include "protover.h" -#include "compat.h" -#include "torlog.h" +#include "routerparse.h" static const smartlist_t *get_supported_protocol_list(void); static int protocol_list_contains(const smartlist_t *protos, @@ -617,6 +617,35 @@ protocol_list_contains(const smartlist_t *protos, return 0; } +/** Return a string describing the protocols supported by tor version + * <b>version</b>, or an empty string if we cannot tell. + * + * Note that this is only used to infer protocols for Tor versions that + * can't declare their own. + **/ +const char * +protover_compute_for_old_tor(const char *version) +{ + if (tor_version_as_new_as(version, + FIRST_TOR_VERSION_TO_ADVERTISE_PROTOCOLS)) { + return ""; + } else if (tor_version_as_new_as(version, "0.2.7.5")) { + /* 0.2.7-stable added Desc=2, Microdesc=2, Cons=2, which indicate + * ed25519 support. We'll call them present only in "stable" 027, + * though. */ + return "Cons=1-2 Desc=1-2 DirCache=1 HSDir=1 HSMid=1 Link=1-4 LinkAuth=1 " + "Microdesc=1-2 Relay=1-2"; + } else if (tor_version_as_new_as(version, "0.2.4.19")) { + /* No currently supported Tor server versions are older than this, or + * lack these protocols. */ + return "Cons=1 Desc=1 DirCache=1 HSDir=1 HSMid=1 Link=1-4 LinkAuth=1 " + "Microdesc=1 Relay=1-2"; + } else { + /* Cannot infer protocols. */ + return ""; + } +} + void protover_free_all(void) { |