protover: Add missing Padding to translate_to_rust

This commit also explicitly set the value of the PRT enum so we can match/pin
the C enum values to the Rust one in protover/ffi.rs.

Fixes #29631

Signed-off-by: David Goulet <dgoulet@torproject.org>

changes/ticket29631

@@ -0,0 +1,4 @@
+  o Minor bugfixes (Rust, protover):
+    - The Rust implementation of protover was missing the "Padding" value in
+      the translate function from C to Rust. Fixes bug 29631; bugfix on
+      0.4.0.1-alpha.

src/core/or/protover.h

@@ -33,17 +33,17 @@ struct smartlist_t;
 /// C_RUST_COUPLED: src/rust/protover/ffi.rs `translate_to_rust`
 /// C_RUST_COUPLED: src/rust/protover/protover.rs `Proto`
 typedef enum protocol_type_t {
-  PRT_LINK,
+  PRT_LINK      = 0,
-  PRT_LINKAUTH,
+  PRT_LINKAUTH  = 1,
-  PRT_RELAY,
+  PRT_RELAY     = 2,
-  PRT_DIRCACHE,
+  PRT_DIRCACHE  = 3,
-  PRT_HSDIR,
+  PRT_HSDIR     = 4,
-  PRT_HSINTRO,
+  PRT_HSINTRO   = 5,
-  PRT_HSREND,
+  PRT_HSREND    = 6,
-  PRT_DESC,
+  PRT_DESC      = 7,
-  PRT_MICRODESC,
+  PRT_MICRODESC = 8,
-  PRT_CONS,
+  PRT_CONS      = 9,
-  PRT_PADDING,
+  PRT_PADDING   = 10,
 } protocol_type_t;
 
 bool protover_contains_long_protocol_names(const char *s);

src/rust/protover/ffi.rs

@@ -30,6 +30,7 @@ fn translate_to_rust(c_proto: uint32_t) -> Result<Protocol, ProtoverError> {
         7 => Ok(Protocol::Desc),
         8 => Ok(Protocol::Microdesc),
         9 => Ok(Protocol::Cons),
+        10 => Ok(Protocol::Padding),
         _ => Err(ProtoverError::UnknownProtocol),
     }
 }