Implement proposal 318: Limit protovers to 0..63

In brief: we go through a lot of gymnastics to handle huge protover
numbers, but after years of development we're not even close to 10
for any of our current versions.  We also have a convenient
workaround available in case we ever run out of protocols: if (for
example) we someday need Link=64, we can just add Link2=0 or
something.

This patch is a minimal patch to change tor's behavior; it doesn't
take advantage of the new restrictions.

Implements #40133 and proposal 318.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/rust/protover/protover.rs b/src/rust/protover/protover.rs
index 06fdf56c69..536667f61b 100644
--- a/src/rust/protover/protover.rs
+++ b/src/rust/protover/protover.rs
@@ -866,12 +866,12 @@ mod test {
 
     #[test]
     fn test_protoentry_from_str_allowed_number_of_versions() {
-        assert_protoentry_is_parseable!("Desc=1-4294967294");
+        assert_protoentry_is_parseable!("Desc=1-63");
     }
 
     #[test]
     fn test_protoentry_from_str_too_many_versions() {
-        assert_protoentry_is_unparseable!("Desc=1-4294967295");
+        assert_protoentry_is_unparseable!("Desc=1-64");
     }
 
     #[test]
@@ -910,10 +910,10 @@ mod test {
 
     #[test]
     fn test_protoentry_all_supported_unsupported_high_version() {
-        let protocols: UnvalidatedProtoEntry = "HSDir=12-100".parse().unwrap();
+        let protocols: UnvalidatedProtoEntry = "HSDir=12-60".parse().unwrap();
         let unsupported: Option<UnvalidatedProtoEntry> = protocols.all_supported();
         assert_eq!(true, unsupported.is_some());
-        assert_eq!("HSDir=12-100", &unsupported.unwrap().to_string());
+        assert_eq!("HSDir=12-60", &unsupported.unwrap().to_string());
     }
 
     #[test]
@@ -962,7 +962,7 @@ mod test {
             ProtoSet::from_str(&versions).unwrap().to_string()
         );
 
-        versions = "1-3,500";
+        versions = "1-3,50";
         assert_eq!(
             String::from(versions),
             ProtoSet::from_str(&versions).unwrap().to_string()