Slightly better error handling

.gitignore

@@ -1,4 +1 @@
-/.rust/
-/bin/
-/build/
-/lib/
+/lib

.travis.yml

@@ -4,7 +4,7 @@ before_install:
 install:
   - sudo apt-get install rust-nightly
 before_script:
-  - openssl s_server -accept 15418 -www -cert test/cert.pem -key test/key.pem &
+  - openssl s_server -accept 15418 -www -cert test/cert.pem -key test/key.pem >/dev/null &
 script:
   - rustc --test lib.rs
   - ./lib

error.rs

@@ -6,14 +6,34 @@ use super::ffi;
 pub enum SslError {
     StreamEof,
     SslSessionClosed,
-    UnknownError(c_ulong)
+    UnknownError {
+        library: u8,
+        function: u16,
+        reason: u16
+    }
+}
+
+fn get_lib(err: c_ulong) -> u8 {
+    ((err >> 24) & 0xff) as u8
+}
+
+fn get_func(err: c_ulong) -> u16 {
+    ((err >> 12) & 0xfff) as u16
+}
+
+fn get_reason(err: c_ulong) -> u16 {
+    (err & 0xfff) as u16
 }
 
 impl SslError {
     pub fn get() -> Option<SslError> {
         match unsafe { ffi::ERR_get_error() } {
             0 => None,
-            err => Some(UnknownError(err))
+            err => Some(UnknownError {
+                library: get_lib(err),
+                function: get_func(err),
+                reason: get_reason(err)
+            })
         }
     }
 }

lib.rs

@@ -1,3 +1,5 @@
+#[feature(struct_variant)];
+
 use std::cast;
 use std::libc::{c_int, c_void};
 use std::ptr;

tests.rs

@@ -32,7 +32,10 @@ fn test_verify_trusted() {
     let stream = TcpStream::connect(FromStr::from_str("127.0.0.1:15418").unwrap()).unwrap();
     let mut ctx = SslContext::new(Sslv23);
     ctx.set_verify(SslVerifyPeer, None);
-    assert!(ctx.set_CA_file("test/cert.pem").is_none());
+    match ctx.set_CA_file("test/cert.pem") {
+        None => {}
+        Some(err) => fail!("Unexpected error {:?}", err)
+    }
     match SslStream::try_new(&ctx, stream) {
         Ok(_) => (),
         Err(err) => fail!("Expected success, got {:?}", err)
@@ -72,7 +75,10 @@ fn test_verify_trusted_callback_override_ok() {
     let stream = TcpStream::connect(FromStr::from_str("127.0.0.1:15418").unwrap()).unwrap();
     let mut ctx = SslContext::new(Sslv23);
     ctx.set_verify(SslVerifyPeer, Some(callback));
-    assert!(ctx.set_CA_file("test/cert.pem").is_none());
+    match ctx.set_CA_file("test/cert.pem") {
+        None => {}
+        Some(err) => fail!("Unexpected error {:?}", err)
+    }
     match SslStream::try_new(&ctx, stream) {
         Ok(_) => (),
         Err(err) => fail!("Expected success, got {:?}", err)
@@ -87,7 +93,10 @@ fn test_verify_trusted_callback_override_bad() {
     let stream = TcpStream::connect(FromStr::from_str("127.0.0.1:15418").unwrap()).unwrap();
     let mut ctx = SslContext::new(Sslv23);
     ctx.set_verify(SslVerifyPeer, Some(callback));
-    assert!(ctx.set_CA_file("test/cert.pem").is_none());
+    match ctx.set_CA_file("test/cert.pem") {
+        None => {}
+        Some(err) => fail!("Unexpected error {:?}", err)
+    }
     assert!(SslStream::try_new(&ctx, stream).is_err());
 }